Khizr Khan’s son was a Muslim US Army captain who was killed protecting soldiers in Iraq. The Pakistan-born Khizr Khan fiercely attacked the businessman at the DNC in Philadelphia, saying that if it was up to Trump, his son never would have been American or served in the military.

Khan said that Hillary Clinton, by contrast, ‘called my son the best of America.’

He asks if Donald Trump has read the US Constitution: “I will gladly lend you my copy.”

VIDEO: Khizr Khan offers Donald Trump his copy of the Constitution at the DNC

Capt. Humayun Khan died in 2004 when a car loaded with explosives blew up at his compound. He was 27.

Honoring his son, Khizr Khan pulled a copy of the Constitution out of his suit pocket and offered to lend it to Trump.

‘Look for the words “liberty’ and ‘equal protection of law,” he said standing next to his wife, waving the paperback document vigorously.

Capt. Humayun Khan died in 2004 when a car loaded with explosives blew up at his compound. He was 27

‘Have you ever been to Arlington cemetery?’ he then asked. ‘Go look at the graves of brave Americans who died defending United States of America.

‘You will see all faiths, genders and ethnicities. You have sacrificed nothing.’

Khan, who moved to the U.S. in 1980, said he and his wife were ‘patriotic American Muslims with undivided loyalty to our country.’

‘Like many immigrants, we came to this country emptyhanded,’ he said, believing that with hard work he could raise his three sons ‘in a nation where they were free to be themselves and follow their dreams.’

Trump, Khan argued, was imperiling that ideal with his smears of Muslims, women, judges and other groups.

He urged Muslims, immigrants and all patriots to ‘not take this election lightly.’